Count stata. You can browse but not post.
- Count stata In your example, price is reported as a positive integer, and for that you don't need to convert to a string variable. I want to know how to count the number of 1 . I want to create a count variable that measures the > number of years it has been since a given country has acquired nuclear > weapons, the variable of interest for my study. egen—Extensionstogenerate Description egencreatesanewvariableoftheoptionallyspecifiedstoragetypeequaltothegivenfunctionbased onargumentsofthatfunction Forums for Discussing Stata; General; You are not logged in. How do you specify the variance function in nbreg to coincide with Cameron and Trivedi's (Regression analysis of count data, FAQs concerning releases before Stata 18. Trivedi (2005), Microeconometrics: Methods and Applications (MMA), C. com Stata understands strlen() as a synonym for its own length() function, so you can use the function named strlen() in both your Stata and Mata code. Hello! For a Especially the word counting command does not seem to work for me. Create missing observations in panel data. If I use the format to control, it gives "for example %4. Panel Data with three identifiers. 6 4. In other words my data is setup on an individual level with > categorical variables for year and region. (Stata 6 required. Case 1: Identifying At 08:47 PM 9/7/2004 -0500, Kang, Eugene wrote: Hi, I have a cross-section panel data that is unbalanced. Stata first calculates the product of weight and value and then compares the result with 2. How to get the count of all observations in a table in Stata 13? 2. The associated population total for the item of interest is collapse—Makedatasetofsummarystatistics Description collapseconvertsthedatasetinmemoryintoadatasetofmeans,sums,medians,etc. Code: local i = 1 foreach x of numlist 1/10 { di `i' local i = `i' + 1 } to count from 1 to 10 with i -- is there a simple way to do the same thing for letters? I. To give a quick reply: Stata has an internal coding scheme for missing values that are . Improve this question. Stata: counting for this period and next period. com count may strike you as an almost useless command, but it can be one of Stata This has to seem naive. In the frequency-weighted case, however, the count is 57, the sum of the weights. id X n rep Stata counting substring. Load a stata . You can browse but not post. For example, in the above dataset, I need to count how many times 1 is repeated and repeated consecutively in the variable X, and these countings are placed in the new variables n and rep, respectively. I used the following two lines of code: egen count_obsv = tag(loc_ID year) This adds a counter to my dataset (count_obsv) which is 1 (and 0 for every element that has the same combination of loc_ID and year) for every new combination. I would like to count for each observation the number of variables that meet a certain condition, say var*==2. Stata Journal 7: 440–443. count 27 Mar 2015, 11:42. How to produce summary statistics table. See It is a broad survey of count regression models; It is designed to demonstrate the range of analyses available for count regression models; It is not an in-depth statistical presentation; Some Stata Specific Information. 1 like Stata follows two rules, the second of which may be considered as a generalization of the first. 3=other count lb ub deff deft White 102999549 97060400 108938698 60. For instance: id year x1 111 1999 3 111 2000 5 111 2001 6 123 2000 4 123 2001 2 For the above example, there are 2 unique ids (111 and 123). Count occurrences across Counting with by. Thank you sir for hinting to a more compact way of doing it. Empower Your Roblox Journey - Dive into in-depth analytics for Roblox experiences and overall platform performance, including engagement, retention, and community data. This means provide Stata code in code delimiters, readable Stata output, and sample data using dataex. I have also tried: count if Bookstore: Categorical, count, and censored outcomes. In the speech presentation attached in #7, What he refered to as faults, traps and clumsiness are still widespread in Stata. 72 1 1 7 1 4 2. Stata has two system variables that always exist as long as data is loaded, _n and _N. Modified 2 years, 4 months ago. Create and Export Tables Using Stata Michael N. Once you have converted your count-time data to survival-time data, you can use the st commands to analyze the data. Svend Juul's great teaching materials (Introduction to Stata 7 and Introduction to Stata 8) are introductory textbooks in my beginning of Stata use. 127 1 1 silver badge 9 9 bronze badges. Perfect. Login or Register by clicking 'Login or Register' at the top-right of this page. What I am looking for is to create a variable (or collapse data) that shows how many jobs they have Let us first look at your code and explain, at least in part, why you got your results. J. proc mixed; Next by Date: Re: st: Creating a Count Variable in STATA; Previous by thread: st: Creating a Count Variable in STATA I was trying to count cases > with the following command: > > count if variablename == "string value" > > which, however, returned me 0 cases. 0. (that is what you asked Stata to do, so that is what you will get). You just need to push the maximum value through ceil(log10()). When I run the above code, I get a "0," but when I browse the data, there are many missing values. 181 1 1 gold badge 4 4 silver badges 16 16 bronze badges. 76 Black 11189236 8213964 14164508 18. Below is the code and results (I have not . dan1st. di `: word count `vlist'' 6 . This portfolio contains 32 observations. 0) Reference Cox, N. retrieving number There is an interesting underlying issue here, what exactly is "programming" in Stata? A precise answer is that a program is whatever is defined by whatever follows a -program- statement. input sic3 year firmid 111 1970 2122 111 1970 2123 111 1971 2122 111 Dear All, I am using the countfit command in Stata 13 to determine which count regression model is the best fit for the a model of number of current domestic migrants, with independent variables: workers in household, nonworkers in household, age of household head, land owned, number of cows, business ownership. ("Categorical variable" is a statistical concept, rather than a Stata concept. Announcement. In the unweighted case, the weight is not specified, and the count is 25. 1. Cheers, Christian---Christian Holz Department of Sociology University of Glasgow Scotland, U. Other than being bound by quotation marks, words in Stata are just defined by being separated by spaces. Trivedi Indiana University. The "length" of a numeric variable is well defined only in certain cases. Is it a way to tell stata that even if the conditions are satisfied more than once per id, it should only count it once? The question shows that no matter how many general or special purpose tabulation commands Stata provides, it is always possible to think of a tabulation problem that is not directly supported. Implementing a counter in Stata, however, is pretty easy. These two statements are giving me the same thing. Stata Journal 7: 571–581. count and drop observations of one variable in a panel data set. 13 in x1 to x13 according to different values of age. Rather than going off on what is analogous to exposure time, the tack is typically to set a threshold that is medically important (that is, a count threshold, or pattern or location of affected lymph nodes that makes a difference in prognosis Hey Stata users, I have panel data on subjects and am interesting in how their wages change with time. count if nvals which would return the Various commands will give you the number of distinct values, for any kind of variable. If the Stata - Count observations within window. I could resolve that problem in the following way: If you want to count the occurrences of 0 in the values across x1-x3, then. Speaking Stata: Making it count. Mata’s length() function returns the length (number of elements) of a vector. For panel data and time-series, rangestat can generate Gesti n Financiera - Divisi n Clientes -----Mensaje original----- De: [email protected] [mailto: [email protected]] En nombre de Chao Yawo Enviado el: jueves, 03 de abril de 2008 01:37 p. Rule 1: Logical or Boolean expressions evaluate to 0 if false, 1 if true. Variable that double counts the observations. Now we're using the "svyset" command and then using "svy: tabulate nativity, count" to get the weighted counts in the dataset. When modeling a count variable, there are several available models to choose from. count if foreign == 1 & rep78 == 4 shows that there are nine such cars in the auto dataset. Count rows in a dynamic range. Thanks Nick! Your code has a number of additional insights (for me) in it over and above answering the questions. Because there are uncertainties about the people who reported "zero" children, I have to truncate the data at the zero values. Multilevel and Longitudinal Modeling Using Stata, Fourth Edition, Volumes I and II One is called count_calls, and counts the total number of calls without a missing call_accept outcome. codebook is a great command in Stata. We will give an overview of the theoretical concepts necessary to understand regression models and show you how to fit them using Stata. See my comment underneath my answer. The independent variables are dummies (birth decades, occupational groups) and the data set is a cross section. Stata: Running sum with missing values. Counting values to get a matrix in Stata. clistmust I am trying to count values of many string variables (hh_1_age hh_2_age hh_3_age etc. Creates a fifth new variable, the unemployment rate I actually want, by calculation from the raw numbers. 5. Hello friends, What's up! In this video, I am coming with a new Stata Command which is "count". Try something like local i=0 foreach a of numlist 1/20 {local i=`i'+1 di `i'} If you'd provide some more detail on what you're planning to do some more advice could potentially be given. You can also use twoway graph histogram to create histograms. 6. Apparently, wordcount() has > been around since Stata 1 as I was able to use it in a little > . 0 by typing <help word> & then by > clicking on <string functions>. R data. aine Uses egen count() with by, to create two new variables recording the raw number of employed / unemployed people in the region. Cumulatively counting up a variable in Stata. So, for example, a macro containing I had the same problem to count the occurrences of specific values in each observation across a set of variables. Hi Azreen, You can see the command -contract- in stata. Displaying counts for subgroups in summary table. Here are the Stata I am interested in generating two variable counting how many times a given value is repeated and how many times it is repeated consecutively. This would seem to require the following simple code: count if control_ == ". table count count; stata; Share. The logical expressions you have used are valid. You want a new variable containing some weighted summary statistic based on response and weight for each distinct group. set rmsg on > > This explains the logic very well, but the code can be telescoped. To illustrate, let’s use stocks. I have one question related to counting distinct values by groups. count; stata; or ask your own question. Follow edited Sep 11, 2015 at 8:30. Abdul-Kareem Abdul-Rahman Abdul-Kareem Abdul-Rahman. Description. How many Shell stations are there close to Q8 between zero and one kilometre? Text Mining with Stata (Language, word count, keywords) 04 Nov 2016, 11:05. Count merged observations and calculate fraction. Applying tokenize to an argument string maps the separate words of that argument to local macros named 1, 2 and so forth. sysuse auto, clear codebook mpg, compact Number of unique values of mpg is 21. Is your response binary (for example, employed or unemployed), ordinal (education level), count (number of children), or censored (ticket sales in an existing venue)? Stata has maximum likelihood estimators—logistic, probit, ordered probit, multinomial logit, Poisson, tobit, and many others—that estimate the relationship between such How to count the number of distinct values (of a variable) that satisfy a given condition 28 Jan 2021, 16:31. Reading in a stata . Viewed 219 times 0 I am using a table that is relatively unstructured in stata. Collapse. I appreciate your help! At 03:02 PM 5/10/2005, you wrote: I'm on record as a big fan of -foreach- but this problem doesn't seem to need a loop at all. Open a dta file in R. 3 (which is not the output I want) The output I want is for all answers to be either 5, 5. If the value is e,g 5. And also, once I would manage that I would like to be able to change the distance of the scale distance (in the third graph the count is much more frequent (absolute number of patients) than on the one I managed to create). " from the count is to take special action with those deemed missing. Stata: If all observations unique, skip code. Join us for an intuitive introduction to regression modeling for continuous, binary, and count outcomes. A new chapter approaches count-data modeling from a Bayesian perspective, and simulation and bootstrap methods have been incorporated into I'm attempting to count the number of observations in a variable with missing values. All the code does is count words inside a string. Even when I made a variable for the first year wages was able and tried So I guess the best way to do it would be: global count: word count `varlist' thanks again Ali After . , . The wordcount() or wordcount machinery has no sense whatever that the words it is counting are variable names. We also need an understanding that true and false conditions evaluate numerically to 1 and 0, respectively, . Hot Network Questions How does schedule 7 of the Terrorism Act 2000 interact with the GDPR? count data analysis 09 Apr 2023, 13:54. Counting distinct strings across a set of variables Author Stata’s definition of missing with strings is the empty string "". Stata: ignore missing values when counting. These make the use of Stata be prone to err. However, I have encountered another issue: If an ID have 2 observations satisfying either of the conditions (i. ) The inclusion of noccur() and nss(), two almost identical functions, was an act of sheer inadvertence by the maintainer. I would like to count the number of variables for which one, the other, or both options, and then, for each observation count the number of don't know, refuse to answer, or both, use it to then have a rate of don't know and refuse to answer per I am not familiar with SPSS, which I understand to be a statistical package, but this sounds like gen count = 0 qui foreach v of var a1-a21 { replace count = count + (`v' == 5) } There is an -egen- function -rcount()- in -egenmore- on SSC, for which the syntax would be egen count = rcount(a1-a21), cond(@ == 5) but the approach from first principles gets higher marks from -egen--haters. Stata - Count observations within window. , have observations set as In Modeling Count Data, examples demonstrate how to fit models using a combination of official and community-contributed commands in Stata. Count the number of distinct strings and their occurrence in a variable. ) One way of excluding ". Adding observations to Introduction 0. asked Dec 3, 2017 at 12:16. In a Poisson regression model, the incidence rate for the \(j\)th observation is assumed to be given by Also, Stata provides Cox regression, exponential, Weibull, and other parametric survival models, Thanks - this works perfectly to give both scalars and variables. Comment from the Stata technical group. But I am > having trouble > getting the coding entirely right. x1 to x13 have values ranging 1 to 13. it could be improved by discussing this issue and providing a fix for situations where missing values ans zeroes should be treated separately. Then I use: collapse (sum) count_obsv, by(loc_ID year) In STATA, the count command not only calculates the total number of observations in a dataset but also allows for the application of specific conditions, enabling users to count observations that meet particular criteria or satisfy certain conditions within the dataset. Here is an example of the data with ID, year, and the job code (i. Mitchell New release. Speaking Stata: Counting groups, especially panels. ") From Daniel Marcelino < [email protected] > To [email protected] Subject Re: st: identifying how many digits string var has: Date Sun, 3 Apr 2011 14:55:56 -0300 Thus a, b and c are unsurprisingly the words in a b c but there are just two words in Stata "is great" You can count how many objects you are looping over. Learn how to use count if to count the number of observations that satisfy specified conditions In my dataset an observation is a firm (f_id), product (p_id), country (c_id). For example, for age 1, in x1 to x13, count the number of 1,2,3,4,13. To fit a model of graduation with fixed coefficient on x1 and random coefficient on x2 at the school level, and with random intercepts at both the school and total— Estimate totals 5 The survey total estimator Let Y j be a survey item for the jth individual in the population, where j = 1;:::;M and M is the size of the population. Stata: Count if non-missing across row for certain range. In the Stata 8 help/manual it says that -count- saves the scalar of number of observations in r(N), but I can't seem to get this number to appear. Count occurrences across different columns with the same information. that seo==1 occurs two times per ID) the ID will be counted twice. Count row-wise in stata. clear input id x1 x2 x3 1 1 0 2 2 2 0 2 3 2 0 3 end egen count2 = anycount(x1-x3), value(0) I have a dataset in Stata and want to count by group (loc_ID) and year. Viewed 58k times 6 . So in the I am not sure if this would meet your needs, but the following code will give you the time in seconds (I use ; to signify end of line, and the "1" is the number one, apparently you can have several timers running at once): Start job timer on 1 ; code you want to run timer off 1 ; timer list 1 ; clear ; exit ; HTH Sam On Sat, 24 Feb 2007, Ben Jann wrote: > Type > > . Although I searched the list, I cannot find the appropriate command and would be very grateful for any suggestions. New Stata has several procedures that can be used in analyzing count data. However, this command gives the weighted counts in, apparently, the total population, not in the dataset. b, . Count by groups and collapse. Use egen = count(1), by(). Wruck > I found it in Stata 9. Counting missing values based on a condition. Counting number of observations with sampling weights. Remarks and examples stata. Counting occurrences of values of string variable using collapse. > > > >You can have it both ways by having variables and scalars too. I have this data: #id time #1 1 #1 2 #2 1 #2 2 #2 1 #2 2 #3 1 #3 2 And I want to create a variable that looks at the id and time combination and puts a 1 the first Count unique values in Stata. > > > >Nevertheless, you want scalars, although I am not clear why. rangestat (count) rep78, int(rep78 . Count of unique values across all columns in a data frame. How to count the number of observations in R like Stata command count. Exhaustive! -----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Nick Cox Sent: Thursday, May 03, 2012 1:00 PM To: [email protected] Subject: Re: st: 2 questions on function wordcount To spell this out (the number 6 here is just the number of variables in a currently open Stata) . Stata tip 51: Events in intervals. a, . I first change x1 to x13 as a matrix by using Re: st: Creating a Count Variable in STATA. I would like to count all the occurrences in which a subject stays in the same location in both years (using Stata). unab vlist : * . Calculation using weights. 1f will display a number whose total output width is 4 with 1 decimal" as Cleves said. Stata does many things without explicit loops, precisely because commands already apply to all observations. Let’s begin by loading and describing a dataset on 316 students at two Los Angeles high schools. rangestat calculates statistics for each observation using all observations where a numeric key variable is within the low and high bounds defined for the current observation. ctset your data so that Stata knows that they are count-time data; see[ST] ctset. Nick [email protected] Eric G. Get number of non-missing rows automatically. I want to start counting in the first year Wages is available. Then use the usual egen functions to count. This flexibility makes it a powerful tool for data exploration and analysis. In addition, what I am > showing is a simplified version of the relevant part of my dataset (the > whole dataset has 178,410 observations and about 40 variables), just to > illustrate what I mean. This is also apparent from the fact that different summary variables will need different names. ) based on multiple conditions, and send output to a new variable schoolage. The problem. Filter Stata Press books Stata Press eBooks also available on: Featured titles . However, you do not want to collapse the data, because you wish to maintain your existing data structure, and, although egen allows the You can merge this list with the variable and then create an indicator for foreigner (=1 if _merge==3). Hot Network Questions In that case, you can create a count to identify rt_count == 11, and the run a sum to check: Code: gen is11 = rt_count == 11 bysort s_id: egen count11 = total(is11) drop if count11 < 9 Row-wise count/sum of values in Stata. Otherwise the way to find out which sums of zeros "should be" missing is to count non-missing values Histograms are a popular tool used to visualize the distribution of a continuous variable. Hello Maybe a weird question, but I can do. Stata Journal 7: 117–130. In the analytically weighted case, the count is still 25; the scale of the weight is irrelevant. 2 7. Colin Cameron and Pravin K. • ml d0 method is used –but a lf method might be This question is basically the Stata version of this question I asked a year ago Counting the number of changes of a categorical variable during repeated measurements within a category. 3. Year: City: Year : Events: 2018: London: 2018: 2: 2018: London: 2017: 2: 2017: London: 2017: London: Hey Im new to stata and was hoping to get some help with something. e. Instead of using the previous block of code, we type . • Cross-section Data. These have been I have a variable age, 13 variables x1 to x13, and 802 observations in a Stata dataset. I would like to have the count on the L side instead of the frequency as is depicted on the third graph. The entire process is as follows: 1. Of course, to use the by command we must first sort our data on the by variable. 2 Stata counting substring. > >(The variables will come in useful for The counts are in a different form than (1)—you may or may not find this desirable. You need Stata - Count observations within window. . In777. So the data will look like this Thank you Nick. di c(k) Dear Stata users, I have a set of variables lets say a, b, c, d, e, f, g, h I want to generate 3 variables that capture the row -mean, -total and -count of these Stata: Counting number of consecutive occurrences of a pre-defined length. I would prefer a simple Stata solution though, without having to learn Thanks for Kit Baum, a new program called rangestat (with Roberto Ferrer and Nick Cox) is now available on SSC. Modified 2 years, 6 months ago. You need a -replace- in the command to change -count1-. It is unclear exactly what you want to count how. Dedication Pravin K. m. Cameron and Trivedi’s Regression Analysis of Count Data, Second Edition, has been completely revised to reflect the latest developments in the analysis of count data. P. COUNTA for ongoing range Excel. Thus egen no_childr = sum(age < 19), by(hhid) or in Stata 9 egen no_childr = total(age < 19), by The percent() option was added to contract to Stata 8 on 1 July 2004. age has values ranging 1 to 9. run) is missing, then we start (or restart) counting at 1; else we just continue counting. Nick [email protected] On 1 May 2013 13:03, Jia Peng <[email protected]> wrote: > Dear All, > > I have a data set with the following structure, > > id date flag > 95001 14jun2000 1 > 95001 12apr2000 1 > 95001 16mar2000 0 > 95001 16nov1999 0 > 95001 10may1999 1 > 95001 30mar1995 0 > 95002 01nov1989 0 > 95002 01mar1985 1 > 95002 01jun1983 0 count; aggregate; stata; Share. I should also note that it is usually better to have Stata data in long format rather than wide (e. 9 6. Speaking Stata: How to move step by: step Stata Journal 2: 86–102. 2002. dta file as a python pandas data frame using pd. Computing a weighted Average per observation (Stata) 1. In your case you should carefully read section 12 "What should I say about the commands and data I use?". 92 Total 117157513 Key: count = weighted counts lb = lower 95% confidence bounds for weighted counts ub = upper 95% confidence bounds for weighted counts deff = deff for variances of weighted Stata - Count observations within window. Starting with Stata 8, the duplicates command provides a way to report on, give examples of, list, browse, tag, or drop duplicate observations. Here we can rely on Stata to generate or replace observations in the current sort order (and, moreover, for any use of time-series operators to work, the data must be in cttost [ST] cttost Convert count-time data to survival-time data The key is the cttost command. Among these, you can likely narrow your data down to one or two models based on how the Remarks and examples stata. It is the number of words in a string. by id S_, sort: gen nvals = (_n == 1) * (S_ != ". if 2000 appeared 3 times , it means there were 3 attacks that year) and then there are subtypes of the attacks. You can use Stata's histogram command to create simple histograms, or you can add options to make more sophisticated charts. How to get the count of all observations in a table in Stata 13? 1. The problem is that the egen count() function is not doing what you might logically expect: it is not counting the number of observations for which the expression is "true". MMA, chapters 21-23 and A. do file that specified version 1. 2007a. Thus if you want to graph percentages of one categorical variable as bars but also indicate the underlying total counts of the other categorical variable on top of each bar, you can do it as follows: variable that sums to 57. read_stata() 0. In addition, Stata datasets and code are available at the author's website. Let's begin by opening the nhanes2l dataset. Best, Ben Ben Hoen LBNL Office: 845-758-1896 Cell: 718-812-7589 -----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Nick Cox Sent: Friday, January 06, 2012 10:47 AM To: [email protected] Subject: Re: st: Count of unique Stata: Counts non-duplicate rows as duplicates. Do I actually have to write a program to calculate this? And how does the "by year" part fit in? Thanks for your help, Heather * count As above, but where catvar equals 3 count if catvar==3 Count observations for each value of catvar by catvar: count Menu Data > Data utilities > Count observations satisfying condition Syntax count if in by is allowed; see[D] by. Entries can take values 0, 1, or 2 (I use Stata/SE 11). 5 etc meaningrounding each value off to the nearest Stata: ignore missing values when counting. As an alternative to using the basic Stata, I found out that I could try to do it with WordStat and QDA Data Miner. Your examples are not consistent on the names or values of identifier variables, so it's hard to Januar 2010 16:58 > An: [email protected] > Betreff: st: generating count and sum variable over two different > categorical variables > > Dear listers, > I´m doing a survival analysis, but also need to present some graphs on a > regional level. In777 In777. Does Stata provide a test for trend? What meta-analysis features are available in Stata? Counting string variables 10 Jun 2021, 06:26. • Alternative: Two-Stage method of moments (TSM) –not available in Stata. 11. U. In the new Stata manuals > flip to page 173 of the Data Management manual. Thanks Abdon its worked for me -----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Mitch Abdon Sent: Monday, November 22, 2010 2:01 PM To: [email protected] Subject: Re: st: FW: Generating a counter variable Hi, try bysort studyid: gen counter=_n On Mon, Nov 22, 2010 at 6:57 PM, Oduwo, Geofrey <[email protected]> wrote: > -count- is a useful command, but you are better off with tab market1 if opcar1 == "AA" Others might want to advise on congress with MS Excel. edu/repec/msug2010/mex10sug_trivedi. I want to count the number of different firmid by each group of sic3 and year, so for 111, 1970 pair, the number of different firmid is 2; for 111, 1971 pair, the count is 3. Counting letters in Stata? 19 Apr 2020, 14:15. Filling in missing values. This is not how I've seen the effectiveness of diagnostic medical devices being evaluated, at least in a government-regulated context. dta. bc. , job_code). 2. The other is count_screened_in and counts the total number of calls with call_accept==1. Here we will focus only on histogram. 5, 6, 6. I am trying to plot a graph of events against year, where essentially the events is a combination of occurrences that occurred Forums for Discussing Stata; General; You are not logged in. Stata 11 is required. From Scott Merryman < [email protected] > To [email protected] Subject Re: st: how to count the number of certain characters in a string variable? Date Tue, 28 Jul 2009 09:18:29 -0500 Definition of "count" command in Stata is "Count observations satisfying specified conditions". Dear All Before posting on the Stata Forum you should have read the forum's FAQ-- your post shows that you didn't do that. 25, it gives 5. > > Then I converted the variable to a numeric one and then the count > worked. From: Michael Horowitz <[email protected]> Prev by Date: st: pkcross vs. _N denotes the total number of rows. I think that the Stata documentation of COLLAPSE, excellent though it is, does not go far enough. regards Krishanu On Feb 12, 2008 10:57 PM, Nick Cox <[email protected]> wrote: > Krishanu's code can be such not to count non-missing ones. These are UK postcodes of either "AB23 8BB" or "AB1 1AA" format. One solution is to create a firm-product identifier, then drop all duplicates and count firm-product observations per firm using "collapse" . Specifically, I want to count the number of observations between the row with the Stata panel data - count people (not observations) in a group. Your code could be problematic for variables in which Then generate the three variables by first counting the relevant observations and dividing: count if _merge generate count1 = r(N) count if _merge != 1 generate count2 = r(N) generate fraction = count2 / count1 display count1 6 display count2 5 display fraction 1. How to check for ANY missing values. Most of what I have tried has started counting in the first observation year and I cannot adjust this. Google Sheets: count occurrences of a string in different columns. Introduction • esp estimates a FIML endogenous switching Poisson count model (Terza, 1998). Count unique values in Stata. Do you know how to obtain the weighted counts in the dataset using "svy"? Here is a similar example sysuse auto collapse (count) count=mpg (mean) mpg weight , by(rep78) It follows from the help that you need to give different variable names for the second and later statistics based on any variable (-mpg- above). This FAQ is likely only of interest to users of previous versions of Stata. Ask Question Asked 8 years, 7 months ago. Follow edited Nov 29, 2022 at 10:46. g. ") Now I should count how many stations there are belonging to a particular brand between zero and one kilometre for every single station. [email protected]> wrote: > Hi statalist, > > Is there any way I can transfer below table into excel file without > copying and pasting from the stata screen? My command is to count by > market how count stores the following in r(): Scalars r(N) number of observations References Cox, N. Counting occurrences where current value is equal to or less than previous 90 day values. Now I appear confused or I do not understand myself. That is, for subject 1, this value is 2, for subject 2, it is 1, for subject 3 it is 0, for subject 4 it is 3 and for subject 5 it is 1. Ask Question Asked 2 years, 4 months ago. One way is: clear set more off input /// ID str15 AQ_ATC amountATC . asked Sep 10, 2015 at 13:00. Para: [email protected] Asunto: st: Creating a Count Variable Hi I have a range of 5 variables that ask respondents who is responsible for different I > appreciate your help! > At 03:02 PM 5/10/2005, you wrote: > >I'm on record as a big fan of -foreach- but this problem > >doesn't seem to need a loop at all. The Overflow Blog Four approaches to creating a specialized LLM. Stata deals in variables and observations, not columns and lines. dta file in R and do data analysis. Count distinct values in a column based on a second column. And what I want stata to do is to generate a new variable which can calacuate the number of attacks (i. Two lines in Austin's code not cited here showed how to do that su totprod, mean loc m=r(mean) I can't Dear Statalist Team! I am working with a count data model, where my dependent variable is the number of children per family. Possible combination (variations) of words in a string variable in stata. Rasool Bux Christina Wei <[email protected]> wrote: Hi Azreen, I am not sure why you would want to create a table using Stata (especially for a publication) when you could create one in Excel (no pun intended Stata!). Thank you very much! The "(exp)" just indicates that Stata is looking for a valid Stata expression here. I am trying to count the number of observations between two specific rows by a group. . Also see I have 1 string variable with 7913 observations. I want to count the number of products per firm (regardless of how many countries it is shipped). It describes data contents but also simply identifies unique values. sort group score by group: generate n1 = _n by group: generate n2 = _N list score group id nt n1 n2 1. describe <varlist> r(k) contains the number of variables in <varlist>. Stata: calculating averages over time. The counts are in a different form than (1) or (2)—you may or may not find this desirable. Dear all, The tag() function of egen goes back a long way in Stata (1999) and just encapsulates a longer-standing trick that I guess is in the manuals somewhere and/or was discussed on Statalist in the 1990s Stata Journal readers can find a self-contained tutorial on by (Cox 2002). Conformability strlen(s Dear Elizabeth Some functions in -egen- will accept a variable list, some will accept a variable, ans some will accept an expression, etc In the case of the rownonmiss() function, it will accept a varlist, and that it why that example works. " The observations in variable control are strings. Count each occurrence of each element in a string. 16k 16 16 gold badges 85 85 silver badges 123 123 bronze badges. For more information on Statalist, see the FAQ. (1) -egen-'s -count()- function just counts how often -- in your example -- the result of evaluating timedispatch<= timecreate[_n] & timedispatch +53<= timecreate[_n] is not missing, and it does that separately for each observation. > > > After this two questions arise: > > 1. For example: take the first station, Q8. I will state the rules, and then we will look at each in turn. <> Using the -msub()- function in Nick Cox's -egenmore- package (SSC), here is an example that counts the number of crosses in the variable "crosses" and creates a new variable which replaces them with "a"s in the variable "replaced". Another thing which I want to count is number of people killed and wounded. - Bloomington (Prepared for 2010 Mexican Stata Users Group meeting,Panel counts April 29, 2010 2 / 77based on A. Counting specify value across columns in r. Below are some From [email protected] To statalist< [email protected] > Subject st: how to count the number of certain characters in a string variable? Date Tue, 28 Jul 2009 22:05:43 +0800 Simple count dependent variable models. After unab vars : <varlist> di `: word count `vars'' you get to see how many variables there are. Stata supports Poisson, negative binomial, zero-inflated Poisson, zero-inflated negative binomial models, zero-truncated Poisson, and zero-truncated negative binomial models. Do not, however, use length() in Mata when you mean strlen(). The nested macro references Count row-wise in stata. Row-wise count/sum of values in Stata. Trivedi covers possible specifications here: http://fmwww. You have a response variable response, a weights variable weight, and a group variable group. Stata’s new mixed-models estimation routines xtmelogit and xtmepoisson make it easy to fit two-way, multiway, multilevel, and hierarchical random-effects models on binary and count data. If I remember your post from earlier, you are doing meta-analysis, correct? totprod > `m' won't work unless the local macro `m' is defined. K. Edit Stata is happy with a reference, implicit or explicit, to values in the previous observation 0 but always returns a missing value. c, I assume from the post that you want to count all kinds of missingness. R table with missing data. 2007c. From: "Andrew Felton" <[email protected]> References: st: Creating a Count Variable in STATA. a simple way to have a macro containing only a letter take on the next letter in the if the previous value (L. pdf The Wooldridge approach on slide 61 can be implemented using a Hi, My dataset contains some variables for which the response option is "don_t_know" and "refuse_to_answer". But the -count()- function accepts only an expression, as noted in this snippet from the help file Forums for Discussing Stata; General; You are not logged in. Using _n and _N in conjunction with the by command can produce some very useful results. _n basically indexes observations (rows): _n = 1 is the first row, _n = 2 is the second, and so on. 31 Other 2968728 414930 5522526 47. Trivedi (2010), insensitive makes counting case-insensitive. > These are the codes I am using: > In this simplified version: > -codebook id if mean_var1 != 11- counts both agents (408 in my dataset Stata’s poisson fits maximum-likelihood models of the number of occurrences (counts) of an event. ===== These functions both predate regular expression syntax in Stata, but I don't think that latter helps much, if at all, with this particular problem. Products. 2007b. ) Perhaps the simplest way to do it for one-off purposes is to ask for a one-way tabulation using tabulate. From bugs to performance to perfection: pushing code quality in mobile apps Stata panel data - count people (not observations) in a group. uud hpey zpmry yzstz iwdf zfh vpvyu ccufh snyk myoybs